Territory



(No Model.)

' G. H. SUTHE'RLAND..

STEAM BOILER.

No. 355,555. Patented Jan. 4, ,1887.

umn" I Ilnll IIIIIIII Im! 5| IIIIII UNITED "STATES PATENT risica..v

GEORGE H. SUTHERLAND, OF WALLA WALLA, WASHINGTON TERRITORY.

STEAM-Bomen.

SPECIFICATION forming part of Letters Patent Nofcsaces, dated January 4, 1887.

l Application tiled November 13,1886. Serial No. 218,780. (No model.)

To all whom, t -may concern: y

Be it' known that I, GEORGE H. SUTHER- LAND, a citizen of the United States, residing at Walla Walla, in the county of WallaXTalla, Washington Territory, have invented certain new and useful Improvements in SteanrBoiL ers, of which this specification, in connection with the drawings accompanying it, is a full and complete description, sufficient to enable those skilled in the art to which it appertains to construct the same.

My invention applies to all boilers where the heated products ofcombustion passing through a horizontal cylinder are brought in contact with metal pipes or iiues containing orsurrounded by water for the purpose of heating such water or converting the same into steam, and more particularly applies to that class of steamgenerating boilers wherein the outer shell or case extends beyond the boiler and tlues, forming a chamberin which the products of combustion from the re-box in a more or less heated condition are discharged immediately before their nal exit through the chimney, or in the case of return-due boilers,7

so calted, immediately beforetheir passage into f and through said return-fines; and the object of my invention is to introduce into said horizontal cylinder or chamber such additions and improvements as will to a large extent utilize the heat passing through such horizontal cylinder or contained in said chamber.

` I have illustrated myinvention by the drawings accompanying this specification and forming a part hereof, in which- Figure l is a perspective View of my invention applied to the chamber formed in an ordinary horizontal cylinder-boiler by the ex tension of the shell or case beyond the dues therein. Fig. 2 is a cross-section of the distributing-chamber of my invention and the pipes connected thereto.

Like letters vrefer to like parts throughout the several views.

Xv is the shell or case of the boiler.

Y is the chamber formed by the continuation of the shell or case beyond the dues.

Z is the exhaust.

A is a chamber formed of wrought or cast iron, communicating by pipe A with the water in the boiler, and also communicating by pipes B B with chamber C. Chamber 'C is connected with the boiler X by pipe O.

Chamber A is termed by me the distribu- 'V tion-chamber,7 as th'e water entering therein th rough pipe A is distributed from said chamber A to and into the several pipes B B. Pipes B B ,vfrom the point of connectionfwith distributing-chamber A. are curved to fit more or less closely the inner surface of chamber Y,

the precise amount of such curve being conpoint of their connection with said chamber C.

Chamber C is, as before described, connected with pipes B B, and serves as a chamber in which the water or other contents of said pipes are collected. From collecting-chamber C connection is made with the boiler by a pipe, C.

rIhe precise number of pipes B B is not material, although it is evident that the greater the number of said pipes the larger the amount of surface exposed to the action ofthe heated contents of chamber Y. An inspection of pipes B B, and particularly that portion of the pipes which lies horizontally, as before described, shows that said pipes niust necessarily be placed a sufficient distance apart to allow of the free circulation of the contents of chamber Y, in the case of a boiler constructed in the manner illustrated by the drawings herein, in order` to allow the passage of the contents of said 'chamber between said pipes and into the chimney or other exit therefor; but in the case of a return-flue boiler pipes B B may be placed as closely together as may be desired, the contents of said chamber having access to the return-nues without having to pass between said pipes.

That portion of pipes B B arranged horizontally, as well as collecting-chamber C, are below the water-line in the boiler to which my invention is attached.

The manner of operation of my invention is as followsz'The vboiler is filled with water IOO vzo

to the Water-line, and the Water from theboiler enters distributing-chamber A, through pipe A', from the boiler, and from said chamber A enters pipes B B, passing through said pipesV to and into collecting-chamber C, and from said chamber C, through pipe G', back into the boiler. Pipe A is attached to the boiler near the lower or under sidewhile pipe C. is attached to the boiler but a short distance below the Water-line in said boiler. The iire is then started in the re-box, and the heated products of combustion from the combustionchamber pass through flues D D in the form of boiler here illustrated, and to which form alone I have thus far practically applied my invention, into the chambe1Y,\vhere the same are brought in contact with chambers A C and pipes B B, heating the contents thereof, after which in a more or less cooled condition from such contact the said products of combustion are allowed to leave chamber Y by the chimney. Where my invention is applied to a return-fine boiler the heated products of combustion pass from the combustionchamber through the large central flue or pipe used -in such boilers into chamber Y, and, after contact in the manner above described with cham bers A C and pipes B B, pass from said chamber Y into and through the return dues.

The application of heat in the mannerjust4 referred to in chamber Y to chambers A C and pipes B B raises the temperature of the Water contained therein, wand va rapid circula,

forced to descend, and no resistance is offered to the free and rapid circulation of the contents of chamber A and pipes B B, and the heated Water collected in chamber C is freely discharged into that portion of the boiler containing Water of about the same or greater temperature as said contents of chamber C;

Having thus described my invention, its

construction, and method of operation, what I claim, and desire to secure by Letters Patent, 1s'- 1. In a steam-boiler, the combination of a distribution-chamber connected with thelower or under side of the horizontal cylinder forming such boiler, pipes leading from said distribution chamber to a collection chamber, said collectionchamber connected with said horizontal cylinder at or near the water-line thereof, the said distribution-chamber, collection-chamber, and pipes connecting them being exposed to the heated products of combustion from the fire-box and combustion chamber in the chamber formed by the cxtension of the outer shell or case of the said horizontal cylinder beyond the boiler and flues, all substantially as described, and for t-he purpose set forth.

2.` In a steameboiler, the combination of a distribution-chamber connected with the lower or under sid-e of the horizontal cylinder forming such boiler, pipes leading from and connecting such distribution-chamber with a collectionchamber, said collection-chamber connected with said horizontal cylinder at or near the Water-line thereof, the said distributionchamber, collection-chamber, and pipes connecting them being exposed to the heated products of combustion from the fire-box passing through the chamber formed by said distribution chamber, collection chamber, and connectingpipes,all substantially as described, and for the purpose set forth.

3. In a steam boiler, the combination of boiler-shell X, chamber Y, pipe A', chamber A, pipes B B, chamber C, and pipe C', all substantially as described, and for the purpose set forth.

GEORGE H. sUTHER'LAND.

Witnesses: I f

LoUIs L. SUTHERLAND, CHARLES, T. BROWN. 

